`<convert.h>`¶

Number and string conversion, and byte-order helpers.

#include <convert.h>

Constants¶

Name	Value	Description
`ntohs`	`htons`	Network to host order, 16-bit; the same swap as htons().
`ntohl`	`htonl`	Network to host order, 32-bit; the same swap as htonl().

int atoh(const char *str);

Convert a hexadecimal string to an integer.

Skips leading whitespace, accepts a sign, and stops at the first non-hex character. No "0x" prefix and no overflow check.

Parameter	Direction	Description
`str`	in	Pointer to the null-terminated hexadecimal string.

Returns: The converted integer value.

char * itoa(int value, char *str, unsigned int base);

Convert a signed integer to a string.

Parameter	Direction	Description
`value`	in	Integer value to convert.
`str`	out	Pointer to the buffer where the resulting string will be stored.
`base`	in	Numerical base, 2 to 36; digits above 9 are lowercase.

Returns: Pointer to the resulting string. The caller MUST ensure the buffer is large enough.

char * utoa(unsigned int value, char *str, unsigned int base);

Convert an unsigned integer to a string.

Parameter	Direction	Description
`value`	in	Unsigned integer value to convert.
`str`	out	Pointer to the buffer where the resulting string will be stored.
`base`	in	Numerical base, 2 to 36; digits above 9 are lowercase.

Returns: Pointer to the resulting string. The caller MUST ensure the buffer is large enough.